| Caterers Supplies Limited | Other services | 2002 |
| Catering 101 Ltd | Hospitality | 2018 |
| Catering Safe Limited | Hospitality | 2021 |
| Caterpillar Financial Services (UK) Limited | Financial services | 1990 |
| Catersoft UK Ltd | Information & communication | 2018 |
| Catesby House Management Company Limited | Households | 2003 |
| Catherines Court (Solihull) Management Company Limited | Households | 2016 |
| Catton Holdings (Isle of Wight) Limited | Professional & scientific | 2008 |
| Catton Properties (Isle of Wight) Limited | Extraterritorial | 2006 |
| Cauli Creative Ltd Trading AS Baked by Christie Ltd | Manufacturing | 2020 |
| Cavara Retreats Limited | Hospitality | 2024 |
| Cavell & Brown Limited | Administrative & support | 2025 |
| Cavendish Executive Limited | Professional & scientific | 2002 |
| Caz's Cakes Limited | Manufacturing | 2020 |
| CB Electrical & Fire Ltd | Extraterritorial | 2024 |
| CB Group Inc Ltd | Financial services | 2025 |
| CBA Capital Investments Limited | Real estate | 2016 |
| CBC Estate Management Limited | Households | 2007 |
| Cbjs Holdings Limited | Financial services | 2022 |
| CC Building Ltd | Construction | 2023 |
| CC Ventures Ltd | Manufacturing | 2025 |
| Ccbt Limited | Health & social care | 2005 |
| CCI Contractors Limited | | 1985 |
| CCL Partners Limited | Real estate | 2017 |
| CCS Bulldog Limited | Wholesale & retail | 2012 |
| CD Build Limited | Construction | 2018 |
| CDC Security Services Limited | Administrative & support | 2022 |
| CDF100 Ltd | Real estate | 2003 |
| CDI Construction Services Ltd | Construction | 2017 |
| Cdos Pcdoctor Limited | Information & communication | 2008 |
| CDR Electrical (Midlands) Ltd | Construction | 2010 |
| CDS Digital Ltd | Information & communication | 2025 |
| CED Beauty Ltd | Other services | 2018 |
| Ceda Developments Limited | Construction | 1987 |
| Cedar Grove (Leamington Spa) Residents Association Limited | Households | 2001 |
| Cedar Mansions Management Limited | Households | 2002 |
| Ceesail Limited | Professional & scientific | 2003 |
| Ceiriog Consultancy Ltd | Health & social care | 2025 |
| CEK Utility Solutions Limited | Construction | 2014 |
| Celestial Data Solutions Ltd | Information & communication | 2021 |
| Celestial Pathways Limited | Professional & scientific | 2015 |
| Cellesté Dermcare Limited | Health & social care | 2021 |
| Celmetrix Limited | Professional & scientific | 2024 |
| Celuform Building Products Limited | Extraterritorial | 2007 |
| Cenpac (A.I.S.) Limited | Other services | 1971 |
| Centaur Dynamics Group Limited | Manufacturing | 2026 |
| Centauro Property Group Limited | Real estate | 2022 |
| Central & Regional Properties Ltd | Real estate | 1988 |
| Central Air International Limited | Manufacturing | 1987 |
| Central Building Solutions (UK) Limited | Financial services | 2007 |
| Central Cabling (Services) Ltd | Construction | 2013 |
| Central Electrical Systems Ltd | Construction | 2010 |
| Central Financial Planning Limited | Financial services | 2011 |
| Central Health (Midlands) Ltd | Wholesale & retail | 2024 |
| Central IT Support Ltd | Other services | 2009 |
| Central Lettings Limited | Real estate | 2002 |
| Central Lighting Design & Supply Ltd | Wholesale & retail | 2018 |
| Central Plumbing and Bathroom Supplies Ltd | Wholesale & retail | 2020 |
| Central Removals & Storage Ltd | Transport & logistics | 2024 |
| Central Solicitors' Chambers Limited | Other services | 1997 |
| Central Tax and Trustee Planning Limited Liability Partnership | | 2003 |
| Central Theatre Supplies Limited | Other services | 1983 |
| Central Wealth Management Limited | Financial services | 2006 |
| Central Wealth Planning Limited | Financial services | 2014 |
| Centrateq Limited | Wholesale & retail | 2008 |
| Centric Enterprises Limited | Financial services | 2022 |
| Centric Places Limited | Real estate | 2022 |
| Centrix AI Ltd | Administrative & support | 2019 |
| Centrum Contracts Limited | Construction | 2013 |
| Centum Industries UK Ltd | Wholesale & retail | 2025 |
| Centurion Global Group Limited | Professional & scientific | 2020 |
| Centurion Investment Group Ltd | Financial services | 2023 |
| Century 21 Pat's Properties Limited | Real estate | 2017 |
| CEO Umrah Limited | Administrative & support | 2023 |
| Cepheid UK Limited | Wholesale & retail | 2002 |
| Cerebrum Private Equity Limited | Professional & scientific | 2009 |
| Cerenaptiq Technologies Ltd | Manufacturing | 2025 |
| Certi Property Ltd | Real estate | 2022 |
| Certibeats Limited | Wholesale & retail | 2020 |
| Ceymor Estates Limited | Real estate | 2022 |
| CF Financial Advice Limited | Professional & scientific | 2020 |
| Cfdproperties Ltd | Real estate | 2021 |
| CFF Trading UK LP | | 2012 |
| CFK Tyres and Alloy Ltd | Wholesale & retail | 2019 |
| CFT Investments Limited | Real estate | 2020 |
| CG Surveyors Ltd | Construction | 2025 |
| CG Training Limited | Professional & scientific | 2017 |
| CH Olson Limited | Manufacturing | 2019 |
| CH Properties and Developments Ltd | Construction | 2023 |
| CH3RRY PI3 Ltd | Manufacturing | 2025 |
| Chabrias Limited | Wholesale & retail | 2015 |
| Chachlani Holdings Ltd | Other services | 2025 |
| Chadbury Manor Management Company Limited | Households | 1983 |
| Chadwick Farms Limited | Agriculture & fishing | 2025 |
| Chai Story Ltd | Wholesale & retail | 2024 |
| Chain Products Limited | Manufacturing | 1983 |
| Chain Warehouse Limited | Manufacturing | 2000 |
| Chairside Assist Ltd | Administrative & support | 2025 |
| Challenging Thinking Limited | Professional & scientific | 2018 |
| Chalvar Properties Limited | Construction | 1961 |